An invertebrate biologist is conducting research with crabs. Her interest is ecdysis. This implies that she studies
A. tagmatization processes in crustaceans.
B. how the HOX gene controls the fusion of the head and thorax into the cephalothorax.
C. how ommatidia function individually in a compound eye.
D. the molting process.
E. how ocelli evolved from mere photoreceptors to imaging lens.
Answer: D
You might also like to view...
The mouse is a particularly useful model for studying human disease because _____
a. mice and humans are 100% genetically identical b. all mice are in essence, clones c. mice do not feel pain and discomfort d. mice and humans are the only species whose genomes have been sequenced e. approximately 90% of human disease-associated genes are present in the mouse genome
Select the statement that correctly describes the roles of histone and nonhistone proteins found in chromatin?
A) Only histones have a structural role in chromatin. B) Only nonhistone proteins have a structural role in chromatin. C) Histone proteins function primarily in chromosome segregation. D) Both histone and nonhistone proteins have a structural role in chromatin. E) Nonhistone proteins function only in replication and chromosome segregation.
Which one of the following is a function of a protein?
A) stores genetic material and enables its transmission to the next generation B) acts as a catalyst, speeding up chemical reactions C) is a major subunit of cellulose D) is a primary structural component of a cell membrane E) provides energy for a muscle contraction
Which lineage includes the fleshy-finned fishes, with fins supported by muscles and an internal bony skeleton?
a. Sarcopterygii b. Petromyzontoidea c. Myxinoidea d. Actinopterygii